forgot attachments > Hi Tom, HP: > > I have two files, each with 3 records. > > 1) 1 record uses "space view perspective" (attached MSG1.png), 2 records use > a lat/lon GDS (attached MSG2.png). The first has an interesting banded > pattern. The second has -9999 as the first lat/lon point (see GDS dump > below). Im guessing that this might mean "calculate the domain using only the > second lat/lon point and nx/ny/dx/dy". But theres nothing in the GRIB spec > that seems to allow this. HP, is this the case? Is "use -9999 to mean > calculate the grid from the other info" part of GRIB standard or is it some > local convention from EUmetsat? > > 2) the 2 lat/lon have unknown parameters 3-1-98 and 3-1-99 (3=discipline, > 1=category,98/99=parameter). These are not in the latest WMO parameter > tables, and they are not in the "local parameter" area of the table (>191). > HP, can you comment on what these are, and if EUM is using WMO parameter > numbers for local parameters ? > > 3) theres some interesting metadata in the local use section that we are not > picking up. Ive copied a complete dump of one of the records below. > > 4) because there are 2 GDS, there are 2 groups. the aggregation is failing > with groups. im not sure if i can fix this quickly, although im taking a stab > at it. > > 4) TDS 4.3 has a complete refactoring of GRIB-2, with a new feature to > specify a collection of grib2 files, which are then correctly aggregated. So > it works correctly because NcML aggregation is not needed. I can give you an > advance copy, but this wont be released for a few months, and then theres the > question of IDV integration. > > John > > ---- > > File=0 > E:/work/whittaker/MSG2-SEVI-MSGMPEG-0100-0100-20090830163000.000000000Z-1002820.grb > Header="(0)(2)(1)(6)(1)(2)(0)(0)(234)u(10)(20)2(4)(5)(1)(0)!V(9)(13)(10)HeaderVersionNo > 0(13)(10)FileType > 2(13)(10)SubHeaderType 1(13)(10)SourceFacilityID > 6(13)(10)SourceEnvId 1(13)(10)SourceInstanceId > 2(13)(10)SourceSUId > 60021(13)(10)SourceCPUId 10 20 50 4(13)(10)DestFaciliyId > 5(13)(10)DestEnvId > 1(13)(10)DataFieldLength > 2184713(13)(10)(0)(171)(24)I(181)(3)(153)(10) (1)B(13)(10)SubHeaderVersionNo > 0(13)(10)ServiceType > 171(13)(10)ServiceSubType 24(13)(10)FileTime > 18869:60361248(13)(10)SpacecraftId > 322(13)(10)(0)(16)(0)(0)(1)(1)I(181)(3)(138)_@ddd(1)(0)(0)I(181)(3)(138)_@(1)(0)I(181)(3)(138)_@(0)(0)I(181)(3)(138)_@(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0) (0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(1)(0)(0)(0)(1)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)(0)" > > Grib2IndicatorSection > Discipline = (3) Space products > Length = 2184244 > > Grib2IdentificationSection > Center = (254) EUMETSAT Operation Centre > SubCenter = (0) null > Master Table = 3 > Local Table = 0 > RefTimeSignif = 3 (Observation time) > RefTime = 2009-08-30T16:30:00.000Z > RefTime Fields = 2009-8-30 16:30:0 > ProductionStatus = 1 (Operational test products) > TypeOfProcessedData = 6 (Processed satellite observations) > > Grib2GridDefinitionSection hash=-1919541760 crc=3711080673 > Length = 72 > Source (3.0) = 0 (Specified in Code table 3.1) > Npts = 576 > Template (3.1) = 0 > > (3.0) Grid definition template 3.0 - latitude/longitude (or equidistant > cylindrical, or Plate Carrée) > 1: > GDS length == 72 > 5: > Section == 3 > 6: Source of Grid Definition (see > code table 3.0) == 0 (table 3.0: Specified in Code table 3.1) > 7: > Number of data points == 576 > 11: Number of octects for > optional list of numbers == 0 > 12: Interpretation > of list of numbers == 0 (table 3.11: There is no appended list) > 13: Grid > Definition Template Number == 0 > 15: > Shape of the Earth == 3 (table 3.2: Earth assumed oblate spheroid with major > and minor axes specified (in km) by data producer) > 16: Scale factor of radius > of spherical Earth == 255 > 17: Scaled value of radius > of spherical Earth == -9999 > 21: Scale factor of major axis of > oblate spheroid Earth == 4 > 22: Scaled value of major axis of > oblate spheroid Earth == 63781400 > 26: Scale factor of minor axis of > oblate spheroid Earth == 4 > 27: Scaled value of minor axis of > oblate spheroid Earth == 63567550 > 31: Ni - number of points > along a parallel == 24 > 35: Nj - number of points > along a meridian == 24 > 39: Basic angle of the initial > production domain == 0 > 43: Subdivisions of basic angle used to define extreme longitudes and > latitudes, and direction increments == -9999 > 47: La1 - latitude of > first grid point == -9999 > 51: Lo1 - longitude of > first grid point == -9999 > 55: Resolution > and component flags == 56 > 56: La2 - latitude > of last grid point == 60000000 > 60: Lo2 - longitude > of last grid point == 60000000 > 64: Di - i > direction increment == 5000000 > 68: Dj - j > direction increment == 5000000 > 72: > Scanning mode == 64 > 73: List of number of points along each > meridian or parallel. == -9999 > > Grib2ProductDefinitionSection > > (4.30) Product definition template 4.30 - satellite product > 1: > PDS length == 24 > 5: > Section == 4 > 6: Number of coordinates > values after Template == 0 > 8: Product Definition > Template Number == 30 > 10: > Parameter category == 1 > 11: > Parameter number == 98 > 12: Type of > generating process == 8 (table 4.3: Observation) > 13: Observation generating process identifier (defined by > originating centre) == 7 > 14: Number of contributing > spectral bands (NB) == 1 > > Grib2SectionDataRepresentation > Template = 0 (Grid point data - simple packing) > NPoints = 576 > > Grib2SectionData > Starting Pos = 2183854 > Data Length = 581 > > > > Hi John.... > > > > Did the data files sample get through okay? If not, I have also posted > > this at: > > <ftp://ftp.ssec.wisc.edu/pub/ssec/tomw/hpgrids.zip> > > > > Thanks again for looking into this... > > > > tom > > > > On Mon, Jun 13, 2011 at 2:32 PM, Tom Whittaker <address@hidden> wrote: > > > Hi John... > > > > > > Thanks....I had simply mis-typed it (guess I should use > > > cut-and-paste)....but since it does not work for me, I'm attaching a > > > zip file with the 2 nc files and the attempt at ncml... > > > > > > Thanks ahead for your help!! > > > > > > tom > > > > > > On Fri, Jun 10, 2011 at 4:11 PM, Unidata netCDF Java Support > > > <address@hidden> wrote: > > >> hi tom: > > >> > > >> jointExisting should be joinExisting. > > >> > > >> if thats not the actual problem, can you send me 2 files to check? > > >> > > >> john > > >> > > >>> I have several files that I want to aggregate over time. Each file > > >>> has two Groups, with a dimension "time" which is used for the desired > > >>> variable...for example: > > >>> > > >>> Group proj1 { > > >>> dimensions: > > >>> time = 1; > > >>> y = 3712; > > >>> x = 3712; > > >>> variables: > > >>> float Instantaneous_Rain_Rate(time=1, y=3712, x=3712); > > >>> ... > > >>> > > >>> I am trying to use NCML to accomplish this, with an "aggregation" > > >>> element like: > > >>> > > >>> <aggregation dimName="time" type="jointExisting"> > > >>> ... > > >>> > > >>> But apparently "time" is not the right syntax for this. I've tried > > >>> "proj1/time" as well, but to no available. I'm hoping you can help. > > >>> > > >>> Thanks! > > >>> > > >>> tom > > >>> > > >>> -- > > >>> Tom Whittaker > > >>> University of Wisconsin-Madison > > >>> Space Science & Engineering Center (SSEC) > > >>> Cooperative Institute for Meteorological Satellite Studies (CIMSS) > > >>> 1225 W. Dayton Street > > >>> Madison, WI 53706 USA > > >>> ph: +1 608 262 2759 > > >>> > > >>> > > >> > > >> > > >> Ticket Details > > >> =================== > > >> Ticket ID: IUX-310433 > > >> Department: Support netCDF Java > > >> Priority: Normal > > >> Status: Open > > >> > > >> > > > > > > > > > > > > -- > > > Tom Whittaker > > > University of Wisconsin-Madison > > > Space Science & Engineering Center (SSEC) > > > Cooperative Institute for Meteorological Satellite Studies (CIMSS) > > > 1225 W. Dayton Street > > > Madison, WI 53706 USA > > > ph: +1 608 262 2759 > > > > > > > > > > > -- > > Tom Whittaker > > University of Wisconsin-Madison > > Space Science & Engineering Center (SSEC) > > Cooperative Institute for Meteorological Satellite Studies (CIMSS) > > 1225 W. Dayton Street > > Madison, WI 53706 USA > > ph: +1 608 262 2759 > > > > > Ticket Details =================== Ticket ID: IUX-310433 Department: Support netCDF Java Priority: Normal Status: Open
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